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Finding the Fourth Proportional to 21,051.60, 29,050.20 and 11,619.60

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Solution

The fourth proportional to 21,051.60, 29,050.20 and 11,619.60 is: 16,034.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,051.60 : 29,050.20 = 11,619.60 : x
  2. Step 2: Convert to fraction form
    21,051.60/29,050.20 = 11,619.60/x
  3. Step 3: Cross multiply
    21,051.60x = 29,050.20 × 11,619.60
  4. Step 4: Simplify right side
    21,051.60x = 337,551,703.92
  5. Step 5: Solve for x
    x = 337,551,703.92/21,051.60
  6. Step 6: Final answer
    x = 16,034.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.